{"product_id":"nordost-qsine","title":"QSINE AC Enhancer","description":"\u003cdiv class=\"pa-d5\" style=\"color:#080808;line-height:1.6;font-size:15px\"\u003e\n\u003cp style=\"margin:0 0 6px;font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:#8d1935;font-weight:600\"\u003eNordost · QRT · Plug-ins\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;font-size:18px;line-height:1.45;font-weight:600\"\u003eA passive plug-in AC enhancer: the QSINE introduces a specific frequency field onto the circuit path that reshapes the sine wave and lowers the effect of EMI noise embedded in the AC. Plug it into a spare outlet on the system's line.\u003c\/p\u003e\n\u003cp style=\"display:inline-block;margin:0 0 18px;padding:4px 10px;border:1px solid #d8d5ce;border-radius:2px;font-size:13px;color:#55524c\"\u003ePrice is for one QSINE with a US plug. Benefits are cumulative; Nordost designs it to be used alongside the QWAVE, QVIBE and QKOIL.\u003c\/p\u003e\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:#d8d5ce;border:1px solid #d8d5ce;margin:0 0 22px\"\u003e\n\u003cdiv style=\"background:#f7f6f2;padding:12px 14px\"\u003e\n\u003cdiv style=\"font-size:20px;font-weight:600;line-height:1.2\"\u003ePassive\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px;color:#55524c;line-height:1.35;margin-top:3px\"\u003efield generator, no connection in the signal path\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f7f6f2;padding:12px 14px\"\u003e\n\u003cdiv style=\"font-size:20px;font-weight:600;line-height:1.2\"\u003eEMI\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px;color:#55524c;line-height:1.35;margin-top:3px\"\u003ereduced on the AC line\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f7f6f2;padding:12px 14px\"\u003e\n\u003cdiv style=\"font-size:20px;font-weight:600;line-height:1.2\"\u003eCarbon fiber\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px;color:#55524c;line-height:1.35;margin-top:3px\"\u003emechanically tuned body\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f7f6f2;padding:12px 14px\"\u003e\n\u003cdiv style=\"font-size:20px;font-weight:600;line-height:1.2\"\u003ePlug-in\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px;color:#55524c;line-height:1.35;margin-top:3px\"\u003eany spare outlet on the same AC line\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin:0 0 12px\"\u003eNordost's plug-ins treat the AC supply in parallel, without putting anything in the current path. The QSINE is one of the two passive AC enhancers: it generates a specific frequency field on the circuit it is plugged into, and that field indirectly reshapes the mains sine wave, a process Nordost compares to dithering, so that the EMI noise riding on the power has less effect on the components downstream.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 12px\"\u003eNordost lists a lower perceived noise floor, more clarity, detail and pacing, and better tonal balance as the results. Neil Gader of The Absolute Sound found backgrounds marked by a dead-calm silence that became a springboard for low-level detail, with greater image stability. Each plug-in works alone, but the QSINE, QWAVE, QVIBE and QKOIL are designed as a modular set and the effect builds as they are combined; the QBASE Reference has several QSINE and QWAVE devices built in for exactly that reason.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 20px\"\u003eUse it in a spare outlet on your QBASE, or any outlet on the same circuit as the system. We keep QSINE and QWAVE on hand to demonstrate on the showroom systems.\u003c\/p\u003e\n\u003ch3 style=\"margin:0 0 8px;font-size:16px\"\u003eKey technologies\u003c\/h3\u003e\n\u003cul style=\"margin:0 0 20px;padding-left:18px\"\u003e\n\u003cli style=\"margin:0 0 5px\"\u003e\n\u003cstrong\u003eFrequency field.\u003c\/strong\u003e A passive field introduced onto the circuit path reshapes the sine wave and lowers the effect of EMI.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 5px\"\u003e\n\u003cstrong\u003eMechanically tuned body.\u003c\/strong\u003e Carbon-fiber housing with gold-plated connectors.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 5px\"\u003e\n\u003cstrong\u003eModular.\u003c\/strong\u003e Designed to be combined with the QWAVE line harmonizer and the QVIBE and QKOIL.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdetails open style=\"border-top:1px solid #080808;margin:0 0 6px\"\u003e\u003csummary style=\"cursor:pointer;padding:12px 0;font-size:16px;font-weight:600\"\u003eSpecifications\u003c\/summary\u003e\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;margin:0 0 14px\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003eAC enhancer, passive plug-in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eDimensions, US plug\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e81.6 mm high × 36.75 mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eVoltage\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003e115 V (230 V EU and AUS versions exist)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eBody\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003eMechanically tuned carbon fiber, gold-plated connectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eInstallation\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003ePlugs into any spare outlet on the system's AC line, ideally a spare QBASE outlet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eSold as\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003eSingle unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px 7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top;width:40%;color:#55524c\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border-bottom:1px solid #d8d5ce;vertical-align:top\"\u003eTwo-year limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp style=\"margin:0 0 14px;font-size:13px\"\u003e\u003ca href=\"https:\/\/www.nordost.com\/qrt\/plugins.php\" target=\"_blank\" rel=\"noopener\"\u003eNordost QRT plug-ins page and specifications\u003c\/a\u003e Specifications from nordost.com and the Nordost USA price list (August 2026).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"border-top:1px solid #080808;border-bottom:1px solid #080808;margin:0 0 22px\"\u003e\u003csummary style=\"cursor:pointer;padding:12px 0;font-size:16px;font-weight:600\"\u003eWhere it sits in the range\u003c\/summary\u003e\u003cdiv style=\"padding:0 0 14px\"\u003e\n\u003cp style=\"margin:0 0 8px\"\u003eNordost's QRT plug-ins and the power products around them, by price.\u003c\/p\u003e\n\u003cul style=\"margin:0;padding-left:18px\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eNordost QSINE AC Enhancer\u003c\/strong\u003e (this model)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qvibe-qv2\"\u003eNordost QVIBE QV2 AC Line Harmonizer\u003c\/a\u003e: active plug-in, $405\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qwave\"\u003eNordost QWAVE AC Line Harmonizer\u003c\/a\u003e: active plug-in, $450\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qpoint\"\u003eNordost QPOINT Resonance Synchronizer\u003c\/a\u003e: component-level resonance treatment, $875\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qbase-qb4-mark-iii\"\u003eNordost QBASE QB4 Mark III\u003c\/a\u003e: four-outlet passive distribution, from $1,400\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qbase-qb8-mark-iii\"\u003eNordost QBASE QB8 Mark III\u003c\/a\u003e: eight-outlet passive distribution, from $2,300\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qsource-linear-power-supply\"\u003eNordost QSOURCE Linear Power Supply\u003c\/a\u003e: six DC outputs, $2,750\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qnet-high-performance-audio-network-switch\"\u003eNordost QNET Network Switch\u003c\/a\u003e: five-port audio switch, $3,800\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qsource-mkii-linear-power-supply\"\u003eNordost QSOURCE MKII Linear Power Supply\u003c\/a\u003e: high-power, dual transformers, $4,500\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qnet7-network-switch\"\u003eNordost QNET7 Network Switch\u003c\/a\u003e: seven ports with SFP, nine power supplies, $5,500\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qkore-ground-unit\"\u003eNordost QKORE Ground Unit\u003c\/a\u003e: parallel grounding, QKORE1, 3 and 6, from $3,000\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qbase-reference\"\u003eNordost QBASE Reference (QB10)\u003c\/a\u003e: ten-outlet reference distribution with QRT inside, $18,000\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qbase-supreme-reference\"\u003eNordost QBASE Supreme Reference\u003c\/a\u003e: Odin 2 wired, 32 A powerCON, $30,000\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/nordost-qbase-gold\"\u003eNordost QBASE Gold\u003c\/a\u003e: Odin Gold wired, 32 A powerCON, $45,000\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin:10px 0 0\"\u003ePair it with the \u003ca href=\"\/products\/nordost-qwave\"\u003eQWAVE\u003c\/a\u003e; the QKOIL QK1 passive enhancer ($285) can be ordered as well.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003ch3 style=\"margin:0 0 8px;font-size:16px\"\u003eReviews\u003c\/h3\u003e\n\u003cul style=\"margin:0 0 22px;padding-left:18px\"\u003e\n\u003cli style=\"margin:0 0 5px\"\u003e\n\u003ca href=\"https:\/\/www.nordost.com\/assets\/images\/review-images\/review-pdf\/TAS%20355%20NORDOST%20QSINE%20QWAVE%20REPRINT.pdf\" target=\"_blank\" rel=\"noopener\"\u003eThe Absolute Sound: Nordost QSINE AC Enhancer and QWAVE AC Line Harmonizer\u003c\/a\u003e (Neil Gader, 2025)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"padding:16px 18px;background:#f7f6f2;border-left:3px solid #8d1935\"\u003e\n\u003cp style=\"margin:0 0 4px;font-weight:600\"\u003ePlan your Nordost system with Pearl Audio\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:14px\"\u003ePearl Audio is an authorized Nordost dealer and Nordost is the power, grounding and network foundation we recommend for high-end systems. We can plan power distribution, grounding, resonance control and the network path for your system and arrange an audition in our Portland showroom. Call \u003ca href=\"tel:+15032222599\"\u003e(503) 222-2599\u003c\/a\u003e or email \u003ca href=\"mailto:sales@pearlaudio.com?subject=Nordost%20QSINE%20AC%20Enhancer\"\u003esales@pearlaudio.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Nordost","offers":[{"title":"Default Title","offer_id":42057930670178,"sku":"NORD-QSINE-US","price":325.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2475\/2780\/files\/1-QSINE_US.jpg?v=1793319236","url":"https:\/\/pearlaudio.com\/products\/nordost-qsine","provider":"Pearl Audio","version":"1.0","type":"link"}